KSA Industrial Automation Company provides PLC retrofit for plants across Saudi Arabia, replacing ageing controllers with current platforms while keeping production logic, field wiring and operator screens working. We survey the installed system, convert and test the code offline, then cut over in a planned shutdown. Programming typically takes 2–6 weeks per system.
What you receive: a written retrofit proposal with the scope, platform recommendation, shutdown plan, duration and price within one working day of receiving your controller and I/O list. Request a quotation
When should an obsolete PLC be retrofitted?
Retrofit the controller when the cost of keeping it alive exceeds the cost of replacing it. The usual triggers are:
- the manufacturer has withdrawn the CPU or I/O cards, and spares come only from the used market;
- the programming software no longer runs on a supported operating system;
- nobody on site can open the program, or the only copy is on one laptop;
- the controller cannot talk to the new SCADA, historian or plant network; and
- failures have started to repeat, with longer repair times each time.
A retrofit moves you to a supported platform on your own schedule. Waiting for a failure moves you to the same platform on the plant's worst day.
PLC retrofit in Saudi Arabia: what we deliver
The retrofit covers the controller, the code and the connected layers. Durations are typical; the survey fixes the real figures.
| Service | Platforms | Standard | Duration |
|---|---|---|---|
| Survey and audit | Controller, I/O, network, power supplies and documentation gaps recorded on site | Per project | Set at the survey |
| New platform | Siemens S7-1200/1500 (TIA Portal); Rockwell ControlLogix/CompactLogix (Studio 5000); Schneider Modicon M340/M580; ABB AC500 | IEC 61131-3 | 2–6 weeks per system |
| Code recovery and conversion | Program uploaded from the live controller, reviewed, converted and annotated | IEC 61131-3 | Within the programming time |
| HMI and SCADA | WinCC, FactoryTalk View, Vijeo/EcoStruxure Operator Terminal Expert; SCADA on WinCC, FactoryTalk, AVEVA or Ignition | ISA-101 and ISA-18.2 where relevant | HMI 1–4 weeks; SCADA 4–12 weeks |
| Validation | Offline simulation, functional FAT and a written test record | Per project ITP | Included |
| Cut-over | Staged or single-shutdown cut-over with a rollback plan | Per project schedule | Planned shutdown |
| Handover | Annotated program, I/O list, as-built drawings, backups | Per project | Included |
If the controller is a Siemens S7-300, the dedicated route is our S7-300 to S7-1500 migration service.
Retrofit the controller or replace the whole control system?
Retrofit the controller and keep the field wiring when the I/O is healthy; replace the whole system when the wiring, panels or instruments are the real problem. We decide this in the survey, not in the sales call, and our PLC migration checklist lists what to gather beforehand.
- Controller swap, I/O kept. Fastest and cheapest. New CPU and communication, existing signal modules or adapters, existing terminations.
- Controller and I/O replaced. For worn or unsupported modules. We re-terminate during the shutdown and run a full check of each loop.
- Full system upgrade. New controller, I/O, HMI and SCADA together, for plants where every layer is at end of life.
Typical legacy platforms we replace include Siemens S5 and S7-300/400, Allen-Bradley PLC-5 and SLC 500, and Modicon Quantum and Premium. Each has a natural successor, and we choose the one that matches your spares, your maintenance team's skills and the rest of your site. Where I/O points change, loop checking and instrumentation services confirm each signal from field to screen.
How is a legacy controller replaced without losing production?
We separate the work that can be done while the plant runs from the work that needs a shutdown, and we keep the shutdown as short as the plan allows.
- Enquiry. You send the controller list, any drawings and your shutdown calendar.
- Site data. We survey the installation, back up the live program and record what is undocumented.
- Design. We issue the retrofit plan: target platform, reused hardware, network changes and cut-over steps.
- Programming. We convert the logic, rebuild the communications and re-link HMI and SCADA tags.
- FAT. We test against a simulated process, close every punch item and issue the test record.
- Cut-over and commissioning. In the shutdown we swap hardware, check every loop and interlock, and restart under supervision.
- Documentation. You receive the program, I/O list, drawings and backups.
- Support. We remain on call through the first operating weeks.
Who we retrofit control systems for
KSA Industrial Automation Company has worked in Saudi Arabia since 1995 and is approved by Saudi Aramco, SABIC and the Royal Commission for Jubail and Yanbu. We have carried out projects for all three, under systems certified to ISO 9001, ISO 14001 and ISO 45001.
Retrofits are most often requested by process plants, water and wastewater works, cement and food lines, and utilities whose first control systems date from the plants' commissioning. We take projects in all regions of Saudi Arabia, and our response on site in the Eastern Province, including Dammam, Jubail and Al Khobar, is within one working day. New controllers are also programmed by our PLC programming services team from your functional description.
Retrofit questions from maintenance teams
Who provides PLC retrofit in Saudi Arabia?
KSA Industrial Automation Company provides PLC retrofit from its base in Al Shati, Dammam, for plants in every region of Saudi Arabia. We are approved by Saudi Aramco, SABIC and the Royal Commission, and the engineers who survey your system also commission the replacement.
What affects the cost of a retrofit?
Cost follows the I/O count, the number of controllers, whether signal modules are reused, how much code must be converted, the state of the documentation, whether the HMI and SCADA also change, and the length of the shutdown. The proposal prices each separately so you can scope in stages.
How long does a retrofit take?
Programming typically takes 2–6 weeks per system, and the cut-over is carried out in a planned shutdown. Total duration depends on the number of systems, hardware lead times and how quickly you approve the plan. The survey gives a firm schedule.
Can you reuse our existing field wiring?
Yes, in many cases. Where the field wiring and terminals are sound, we match the new I/O to the existing terminations so the shutdown is spent on testing, not re-cabling. The survey records the condition of each cabinet, and the proposal states exactly what is reused and what is replaced.
What if we have no backup of the old program?
We upload the program from the running controller, and if that is not possible we rebuild the logic from the wiring, the HMI and the operators' knowledge. Either way, you finish with a documented, backed-up program. Starting this before a failure gives far more options.
What should I send to get a quotation?
Send the controller make and model list, the I/O count, any drawings or P&IDs, and the dates of your next planned shutdown. Photographs of the cabinets help when drawings are missing. The proposal then sets out scope, duration and price.
Planning a PLC retrofit in Saudi Arabia? Send your controller list and I/O count and receive a quotation within one working day.
Email: inquiry@ksaindustrialautomation.com | Request a quotation